Prepared roofing



June 10, 1930. 0, K Ls N AL 1,762,404

PREPARED ROOFING Filed July 21 2 Sh ets-Sheet l June 10, 1930.

O. MICKELSON ET AL PREPARED ROOFING Filed July 21, 1923 2 Sheets-Sheet 2 Patented dune 10, 193i) ALFRED O. MICKELSON AND DONALD A. CUMFER, OF CHICAGO, ILLINOIS, ASSIGNORS,

BY MESNE ASSIGNMENTS, TO THE PATENT AND LICENSING CORPORATION, OF BOS- TON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS EREIE'ARED ROOFING- Application filed July 21,

This invention relates to improvements in prepared roofing and refers more particularly to roofing units or prepared roofing shingles made from a felted fibrous sheet satu rated and coated with a waterproofing substance such as asphalt and the like, and surfaced with a grit or granular surfacing material.

Among the objects of the invention are to provide a roofing'which is cut from a sheet without waste, producing units which are self-spacing and interlocking so as to prevent curling or warping when laid upon a roof; to provide units which areattractive in design and which supply a maximum surface by the use of a minimum amount of material or stock in manufacturing the shingles; to provide roofing units which when laid produce a rigid unitary construction and an attractive design for roof covering.

Fig. 1 shows a portion of the sheet after being run through a cutting, mechanism. Fig. 2 is a face view of one of the units. Fig. 3 is a section of the roof showing the method of laying the shingle units. Fig. 4 is a modified method of cutting the sheet for producing units having a folded back engaging portion. Fig. 5 is a face view of the units out by the method shown in Fig. 4:. Fig. 6 is a perspective view of a unit such as that shown in Fig. 5. Fig. 7 is a fragmentary view of a, portion of the roof showing the manner in which units having the folded-back portions are laid.

Referring to the drawings, at 1 is shown a roofing sheet which is preferably of a felted fibrous material such as that commonly used as the present time for the manufacture of prepared roofing having a base of fibrous stock saturated and coated with a bituminous material preferably asphaltic in character and surfaced with a grit or granular surfacing material of a desired color. Such surfacing materials as green, gray and red slate or colored gravel or grit may be used for this purpose. This surfacing is rolled into the adhesive bituminous coating either prior to or subsequent to the coating operation.

The invention has to do particularly with 1923. Serial No. 65$,Eltl6.

the method of cutting and the configuration of the shingle units produced.

The sheet 1 on being run through the cutting machine is severed transversely along the lines 2, these lines being interrupted centrally as are the longitudinal cuts 3. Centrally of the sheet are made diagonal cuts shown at 4, at the extremities of which are \l-shaped incisions designated as 5. The extremities or legs of these incisions connect with the transverse and longitudinal cuts respectively whereby at the bottom of each shingle is produced a fan shaped locking appenda e shown at 6. The V shaped incisions 5 produce the spacing notches which register with the corner of the adjacent shingle units designated as 7 on the shingle unit shownat 8 in Fig. 2.

The method of laying the shingles is clearly shown in Fig. 3. The units 8 are laid side by side with the corner 7 engaging or registering with the notches 5, which space the shingles properly; The spreading corners of the locking appendage 6 are drawn up beneath the edges of the underlying shingle units so that the edges slip into the cuts 9 fixedly engaging the fan shaped appendages and preventing flapping, or curling of the lower extremities of the units. In this manner the shingles are laid row upon row, the nailing being done near the corner designated as 7 in Fig. 2 and wholly concealed beneath the overlying shingles as the successive rows are laid.

In the drawings a square shaped shingle has been shown, but it is understood that this may be varied by other designs or configurations such as hexagonal or octagonal, diamond shaped or innumerable other geometric figures. As explained, the units may be surfaced with any desired color to produce the desired coloring effect when laid on the roof.

It will be noted also that the overlapping portion of the shingles is relatively small so that the units cover the maximum surface for their size. A further advantage of the design is the manner in which they are cut from the sheet, there being no waste in the cutting operation.

In Figs. 4, 5, 6 and 7 are shown shingle units out according to a modified form of construction whereby the fan-shaped engaging or locking portions 6 are folded back and slipped under the adjacent shingles when laid in the manner shown in Fig. 7.

When cutting shingles of this character, as shown in Fig. 4, the slits adjacent the base of the locking fans are eliminated as the locking elements 6 are folded back in place of being merely slid under the adjacent shingle units.

As shown in Fig. 7 the units will be selfspacing similarly to the arrangement shown in Fig. 3. The roof when laid, however, will present a slightly different efi'ect in that instead of a widened lower horizontal edge, the lower portions of the shingles will be truncated as shown in Fig. 7

We claim as our invention:

1. Flexible roofing units having outwardly flaring locking appendages at their lower extremities, said appendages being substantially a truncated triangle in form, the base of the truncated triangle forming a horizontal line perpendicular to the vertical diagonal, constituting a bisector of the upper angle of the shingle, the spreading corners of said appendages adapted to engage beneath the edges of the underlying units, aligning and spacing notches cut out of one corner adapted to register with an opposite corner of adjacent units for accurately positioning the units on the roof during the laying operation, the material severed from opposite units in forming said notches comprising the locking appendages for other opposite adjacent units.

2. Flexible roofing units having a substantially rectangular configuration adapted to be laid with their diagonals parallel to the longitudinal andtransverse directions of the roof, outwardly flaring locking appendages at their lower extremities, said appendages being substantially a truncated triangle in form, the base of the truncated triangle forming a horizontal line perpendicular to the vertical diagonal, constituting a bisector of the upper angle of the shingle, the spreading corners of said glppendages adapted to engage beneath the e ges of the underlying units,- aligning and spacing notches cut out of one corner adapted to register with an opposite corner of adjacent units for accurately positioning the units on the roof during the laying operatiomsaid locking appendages comprising the material severed in forming said notches.

3. Flexible roofing units having a substantially rectangular configuration adapted to be laid with their diagonals parallel to the longitudinal and transverse directions of the roof, outwardly flaring locking appendages at their lower extremities, said appendages being substantially a truncated triangle in form, the base of the truncated triangle forming a horizontal line perpendicular to the vertical diagonal, constituting a bisector of the upper angle of the shingle, the spreading corners of said appendages adapted to engage beneath the edges of the underlying units, aligning and spacing notches at one extremity of the horizontal diagonal of the units registering with the corner of adjacent units and adapted to space the units properly during the laying operation, the area of the notches being equal to the area of the locking appendages, said locking appendages comprising the material severed in forming said notches.

4. A flexible shingle having its opposite sides parallel and lugs extending outwardly from the sides and adjacent one corner of the shingle and adapted to engage under the adjacent shingles, another corner of the shingle having a registering recess formed therein.

5. A flexible shingle having its opposite sides parallel and lugs extending outwardly from the sides and adjacent one corner of the shingle, another corner of the shingle having a recess formed therein, the corners with the lugs and the recess being associated with the same side, and the sides adjacent the other corners being continuous and straight until they meet at the respective corners.

6. A shingle formed with lugs projecting from one corner and a recess formed in another corner,.the size and shape of the recesses being substantially the same as the size and shape of the lugs combined.

ALFRED O. MIGKELSON.- DONALD A. CUMFER. 

